We made no muster, but we did keep an unofficial count of the persons coming into the conning tower for a look, in some cases to photograph the famous landmark with their own cameras (which they had been permitted to bring provided all film was turned in for checking). Every man wanted a look, and it was necessary to go back and forth five times in front of the Cape before all hands had had their view.
Triton’s Log for the passage may give some idea of the conditions the old-timers faced in the days of sail.
Our observations of the conditions make it quite clear why it was such a tremendously difficult thing for old-time seafarers to weather this famous Cape. In the first place, though we are safely submerged and comfortable, Triton is rolling rather heavily. There is an unusually rough sea topside. Lt. James C. Hay, recently reported aboard from West Milton, has already established himself as a most competent diving officer—but he is having difficulty in maintaining ordered depth today. Good practice for young officers, and planesmen, too. We estimate the waves as 10 to 12 feet high and the wind about 25 knots from the west.
There are occasional rain squalls and the cloud coverage is rather low to the water. It is also noticed, after a few navigational cuts, that we are being set backwards, to the east, by a current of some 3 knots. Under such conditions it is easy to see how an old wind-jammer, trying to beat her way around the Cape, might find it almost impossible. Heavy winds and a strong current were both dead against her. Even a steamer would have her troubles at a time like this.
Although the conditions we have observed could hardly be called a storm, there is no doubt that any ship riding around Cape Horn on the surface today would be having a rough and uncomfortable trip. By contrast we are comfortable and snug.
Joe Roberts had spent practically his entire life as a photographer, and was one of the National Geographie’s best. He also happened to be endowed with a genial personality which generated real affection on the part of officers and crew alike. An illustration of this was an incident that occurred in the conning tower as we passed Cape Horn. After taking his National Geographic pictures with half-a-dozen expensive cameras which he had slung around his neck, Joe had been about to make room for others by going below, when a sailor with a box camera appeared in the conning tower. Photographing through the periscope is by no means a simple procedure and Joe put down his cameras and other paraphernalia and turned back to help.
Sailor after sailor—and some officers, too—came to the conning tower with cameras, and to each one Commander Roberts patiently showed the tricks of the game, helped calculate and adjust the periscope diopter setting for the particular camera, plus the camera settings for the type of film and the outside light. Money could not have purchased the instruction and assistance these men were getting for nothing, and I wished I had had the sense to bring my own camera.
We had hoped the passage to Easter Island would be uneventful, after the rather strenuous navigation around the Falkland Islands and Cape Horn. I looked forward to a twenty-five-hundred-mile run through deep water, few problems, and a chance to read Thor Heyerdahl’s book, Aku-Aku, in which he describes his search for the origin of the Easter Islanders and his re-erection of one of the stone monoliths. It was, unfortunately, not to be so.
The tremendous capability of the nuclear power plant and the many changes in submarine operating procedures which it requires were brought firmly home the day after we passed Cape Horn, when we held a “loss of all main power” drill. All naval ships are required to carry out such exercises, for the obvious reasons that they develop the crew’s ability to cope with the problem should it occur in battle or as a result of some mishap.
Triton had, however, traveled some two thousand miles at great speed since she had last “gotten a good trim,” as submariners say. She had, moreover, changed from Atlantic waters off the River Plate to Pacific waters on the far side of Cape Horn, and was well on her way toward Easter Island. Our instruments, and those of Nick Mabry from the Hydro-graphic Office in Washington, gave us some idea of the change in salinity of the sea water—generally speaking, the Atlantic side of South America was saltier. We had taken aboard a good deal of water for various purposes, including running our evaporators and keeping our fresh water tanks full, and we had pumped varying amounts of water overboard to compensate for our computed decreased buoyancy.
Prior to the test, Tom Thamm sought me out.
“Captain,” he said, “my calculations show us to be pretty heavy by the time you consider the reduced salinity and the changes which have taken place in our internal weights.”
“Yes?” I said.
“According to these figures we ought to pump out about seventy thousand pounds before we have the drill …”
“Tom,” I interrupted, “aren’t your Diving Officers and Diving Chiefs keeping up with the trim as we go along?”
“Yes, sir, but I made a special computation because of this drill coming off, and that is what the figures show.”
This would be an opportunity for a good lesson, I thought. “Permission not granted, Tom,” I said. “The sort of casualty that we’re simulating might happen at any time, and we would have to face it with the conditions existing at that time. Suppose we really were to lose all power right now, rather than an hour from now after you get all this water pumped out?”
I had Tom there and he knew it, though I could see that he did not fully approve. “Aye aye, sir,” he said. “I’ll stand by in the control room just in case.”
I grinned at him. Tom was a perfectionist who didn’t want to have anything go wrong in his department. If the ship were too badly out of trim, a short blast of high-pressure air in the main ballast tanks was the quickest way of expelling a lot of water and stopping her descent. Then, the air in the tanks would have to be vented off—partly, at least—as we came up. Otherwise, with reduced external pressure as the ship rose to shallower depths, the air in the tanks would expand even more, thus still further lightening her. Blowing precisely the right amount to balance exactly could not be guaranteed, and several blowings and ventings would undoubtedly be required before the trim pump could get rid of enough water. And later, Curt Shellman’s carefully tended air compressors would have to perform considerable extra work to recharge the air banks.
In the unlikely event that Tom was wrong, that the ship was light instead of heavy, water would have to be taken in rapidly in order to keep her from broaching surface; but with the aid of sea pressure, this is always a much easier thing to do than to pump it out.
The particular problem that faced us had almost never been experienced in battery-driven submarines, for these normally operate at minimum speed while submerged in order to conserve their vitally important batteries, and any divergence from a perfect submerged trim is instantly evident. As a consequence, all old-fashioned submarines automatically stay in perfect trim, practically as a reflex action, whenever they operate submerged. Being even slightly out of trim causes difficulty in maintaining depth at slow speed. But at our sustained high speed, a few hundred tons of extra weight, or buoyancy, would be unnoticeable—until we slowed down.